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X-0.2X=450
We move all terms to the left:
X-0.2X-(450)=0
We add all the numbers together, and all the variables
0.8X-450=0
We move all terms containing X to the left, all other terms to the right
0.8X=450
X=450/0.8
X=562+0.39999999999998/0.8
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